This was such an emotional episode. Prem was incredibly brave. Umbreen is a strong woman. To face bigotry and hatered, but still live your life anyway. To loose your new husband like that...
I hope that Yaz got that watch because Umbreen recognized older Yaz. Time travel never fully addresses these moments. I want Umbreen to see the Doctor again. I think it's beautiful that she wanted something special and so full of love, the promises and heartbreak to go Yaz. She now fully understands the meaning and emotion behind it. And thanks to Thirteen, Yaz can understand the signifiance as well.
The brother was so misguided by his bigotry and lack of understanding. Another important episode. It must have been so hard for The Doctor to walk away knowing what was about to happen. And this is a hard lesson thst all companions learn- it's not all fun and games. Real people can get hurt. Though the Doctor has got to say no when asked if they can use the TARDIS like this. It never ends well.